Method of manufacturing regenerated positive electrode

Abstract

Provided is a method of manufacturing a regenerated positive electrode in a used lithium ion secondary battery including a laminate having a positive electrode, any one of a separator and a solid electrolyte layer, and a negative electrode, the method of manufacturing a regenerated positive electrode including extracting the positive electrode from the laminate, pressing the extracted positive electrode, and doping the pressed positive electrode with lithium ions, the doping of the lithium ions being performed by a discharge using a lithium electrode as a counter electrode in an electrolyte.

What is claimed is: 
     
         1 . A method of manufacturing a regenerated positive electrode in a used lithium ion secondary battery including a laminate having a positive electrode, any one of a separator and a solid electrolyte layer, and a negative electrode, the method of manufacturing a regenerated positive electrode comprising:
 extracting the positive electrode from the laminate;   pressing the extracted positive electrode; and   doping the pressed positive electrode with lithium ions,   wherein the doping of the lithium ions are performed by a discharge using a lithium electrode as a counter electrode in an electrolyte.   
     
     
         2 . The method of manufacturing a regenerated positive electrode according to  claim 1 , wherein the positive electrode is cleaned with an organic solvent before the pressing. 
     
     
         3 . The method of manufacturing a regenerated positive electrode according to  claim 2 , wherein the laminate extracted from the lithium ion secondary battery is cleaned with the organic solvent, and the positive electrode is extracted from the laminate which was cleaned with the organic solvent. 
     
     
         4 . The method of manufacturing a regenerated positive electrode according to  claim 1 , wherein the positive electrode is pressed so that a thickness of the positive electrode after pressing becomes 85 to 100% of a thickness of the positive electrode before use. 
     
     
         5 . The method of manufacturing a regenerated positive electrode according to  claim 1 , wherein the laminate is wound around.